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Laine, M.L. et al.

Laine, Farré, González, van Dijk, Ham, Winkel, Crusius, Vandenbroucke, van Winkelhoff, Peña,

Polymorphisms of the interleukin-1 gene family, oral microbial pathogens, and smoking in adult periodontitis.

Interleukin (IL)-1alpha, IL-1beta, and IL-1ra contribute to regulation of the inflammatory response in periodontal tissues. We aimed to investigate the distribution of polymorphisms in the IL-1 gene family among periodontitis patients and controls, taking into account smoking and microbiology as additional variables. Fifty-three non-smoking and 52 smoking patients with severe adult periodontitis and 53 controls were genotyped for bi-allelic IL-1A(-889), IL-1B(-3954), and a penta-allelic 86-bp VNTR IL-1RN gene polymorphisms. The presence of Porphyromonas gingivalis and Actinobacillus actinomycetemcomitans was established by culture techniques. We found a higher frequency of allele 2 carriage in IL-1A, IL-1B, and IL-1RN in periodontitis patients who were non-smokers and in whom P. gingivalis and A. actinomycetemcomitans could not be detected (42.1% vs. 11.3% in controls; P = 0.0068; OR 5.7, 95% CI: 1.6-19.8). Our results provide evidence that polymorphisms in genes of the IL-1 family are associated with severe adult periodontitis in the absence of other risk factors tested in this patient population.[1]

References

Polymorphisms of the interleukin-1 gene family, oral microbial pathogens, and smoking in adult periodontitis. Laine, M.L., Farré, M.A., González, G., van Dijk, L.J., Ham, A.J., Winkel, E.G., Crusius, J.B., Vandenbroucke, J.P., van Winkelhoff, A.J., Peña, A.S. J. Dent. Res. (2001) [Pubmed]

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